Red Bull Soapbox Race: 11 a.m. Thirty-six teams driving human-powered carts will careen down Fremont Avenue in a competition where contestants are judged on speed, creativity and showmanship. Based on these criteria the early edge has to go to Team Saget, a cart that driver Jason Lipczynski describes as "a wrought iron garden car, a few used bike frames, one faulty bullhorn and the best paper maché Bob Saget head ever." But not to be overlooked is Lincoln Log, a contraption that resembles the cabin that Abraham Lincoln grew up in "to show that even from a simple beginning, that someone can achieve greatness." Truly inspiring. First race is at 1 p.m. Fremont Avenue, between North 41st and North 36th streets; redbullsoapboxusa.com.

Arctic Monkeys: 8 p.m. The English indie-rock band is on tour in support of their sophomore album, "Favourite Worst Nightmare." The Coral opens. WaMu Theater, 800 Occidental Ave. S.; 206-628-0888. $25.